Car-brake shaft.



GARSGADIN @L G. WOODMAN GAR BRAKE SHAFT,

APPLICATION FILED APR.22.1912.

atentef M1128, 1913.

'panying drawing, illust sra i GHRLES A. CARSCADIN AND GEORGE A. WOODMAN, OF CHICAGO, ILLINOIS, ASSIGNORS F ONE-THIRD TO RAYMOND C. DUDLEY, OF CHICAGO, ILLINOIS.

CULR-:BRAKE SHAFT.

Specification of Letters Patent.

Patented Jan. 28, 1913.

Application led April 22, 1912. Serial No. 692,531.

have invented certain new and useful mprovements in Car-lrake Shaft-s, as set forth inthe following specicat'ion.

Our invention relates in general to brake shafts, and more particularly to devices of this character which are used upon railway cars, street cars and the like, and has for one of its principal objects the provision of a` brake shaft or stem which will be lighter in weight and cheaper to construct than those heretofore employed.

To this end the invention contemplates the construction of a brake shaft from hol low metallic tubing` shaped to receive the various parts of the wiiullass, and to retain them fixedly in position.

Further objects and advantages of our invention will be apparent as it is better understood from the following description which, taken in connection with the aecom- 'atcs one preferred embodiment thereof.

(ln the drawings: Figure 1 discloses a front elevation of a portion of a freight car provided with a brake shaft constructed in pursuance of our invention ;A F ig'. 2 is a vcrtical central sectional view with parts broken away of the windlass shown in Fig'. 1 5 Fig. 3 is a horizontal sectional view taken Qn the line 3 3 of Fig. 2; Fig. i is a vertical central sectional view with parts broken away disclosing' a modified form of the shaftshown in Figs. 1, 2 and 3, and Fig. 5 is i. front elevation of the lower end of the shaft disclosed in'Fig. l showing' the engagement between the bottom of the shaft and the brake shaft step when the shaft in Fig. l is empl oye d For the purpose of illustrating our invention we have shown a brake windlass generally designated as rotatably mounted upon the end of'a freight car 11 in suitable shaft bearingrs12. This windlass is constituted primarily of the operatingmember or wheel 13, the shaft 14, the ratchet wheel and the brake spool 16.

The shaft 1st is formed of a hollow tube of suitable metallic material, the upper end of which is shaped to fit snugly within the aperture of the operating wheel 13. This aperture, in accordance with the usual custom, is square orY rectangular 1n horlzontal section and is tapered throughout its lengt-l1 as is shown' in Figs. 2 and Ll, it being understood, however, that the end 18 may be shaped to fit apertures having any desired form without departingfrom the spirit and scope of the invention.

In the embodiment of the invention shown in Fig. 2, the wheel after beingl positioned upon the end of the shaft 17 is drawn down thereover and retained in fixed relation theretol by means of a bolt 21, the head of which rests upon the upper surface of the hub of the wheel. and the end of which is secured in threaded engagement with the nut 22, a portion of the said nut being shaped to lit accurately within the shaped end 18 of the tube 17 as at 23, the remaining portion of the nut forming' a shoulder bearing' against the shoulders 24s formed within the tube where the shaped end joins the main portion of the shaft. Beneath the operatingl wheel 13 and immediately above the roof of the freight. car when the windlass is in operative position, as shown in Fig. 1, one side of the tube 17 is pressed inwardly to provide a bearing surface 2.5 against which the key 26 is positioned to lock the ratchet wheel 15 to the shaft. The chain spool 16 is formed by fitting the lower end of the shaft 17 within a tubular member 27 where it'is scoured in suitable manner.

The outer tube 27 is diminished in diameter beneath the end QS of the tube 17 to provide a shoulder 29 adapted to bear against the brake shaft step 31 in which the end of the shaft 32 is rotatably mountedas is shown in Fig. Q. To retain the shaft in position and to prevent it. from being lifted out of the step 31 we Aprovide al split key or Cotter-pin 33 of the usual form. Extending through both tubes and secured in posi tion in any suitable manner is provided an eye 'bolt 34 with which the end of the brake chain 35 is engaged. l

Inthe embodiment of the invention shown in Fig. 4 the tube 36 is shaped at its upper end like .the tube 17, and yis positioned in the aperture 19 of the operating wheel 13. In this embodiment, however, the wheel is drawn down over the end of the tube` and retained in position by means of a. split member 37 as is shown in Fig. 4. The member 37 has an enlarged head adapted to'bear against the upper surface of the hubl of the Wheell and is proyided with an aperture 38 extending throughout the length of the said member. This member is provided With a plurality of longitudinally disposed slits 39 extending from the end of the member oppositev thevhead 40 and terminating adjacent the said head. After the operating wheel 13 has been positioned upon the end of the tube the member 37 is positioned Within the tube having the head l0 bearing against the hub of the operating wheel 13. With the parts in this relation the head of the member 38 is positioned against an unyielding surface and a sharp pointed-tool of suitable dimension and shape is introduced into the aperture 38 to spread the ends of the member 37 as is shown in Fig. l to engage the shoulder l1 formed between the main portion of the tube 3G and its shaped end.

Then a brake shaft step 42 of the type disclosed in Fig. 5 is employed a shoulder 43 is provided at the upper end of the tube 44 forming a chain spool 45 as is shown in Fig. ll. Ln this form, however, the eye-bolt .34 to which the brake chain is attached is secured through the tubes 8G and 44E beneath the step instead of above it as in the embodiment iirst described.

It will be, manifest from the foregoing de* scription that a slight modification Well Within the experience and skill of those familiar with the art will permit a brake shaft made in pursuance of our invention to be employed upon street cars and in fact upon any vehicles or Amachines employing a rotatable brake shaft.

It is `obvious also that various minor changes may be made in the form of the parts and their arrangement Without departing from the spirit or scope of our invention, orsacricing any of its advantages, the forms hereinhetore disclosed being` merely two preferred embodiments thereof.

lVe claim l. A. shaft for car brakes comprising a hollow tube shaped at it-` upper end to rc-V ceive an operating mouiller, and being adapted to be rotatably mounted at a car end, and a second tube fitted upon the lower end of said first-named tube and adapted hollow to have secured thereto an end of a braker chain.

2. A shaft for car brakes comprising a tube shaped at its upper end to receive an operatingmember and being adapted to be rotatably mounted at a car e-nd,' and a second tube fitted upon thelower end of said iirst-namedtube, said latter tube hav` ing a peripheral shoulder adapted to rest upon the brake shaft shaft in position. v

3. AY shaft for car brakes comprising a hollow tube adapted to be rotatably mounted at a car end and to receive an operating member at its upper end, and a second tube tted'-upon the lower end of said firstnamed tube,l and means disposed through both tubes for attaching the brake chain to the shaft.

4. A- shaft for car brakescomprising a hollow tube shaped to engage an operating member7 said tube being adapted to be rotatably mounted at a car end, and means disposed Within the said tube for securing the said operating member in position.

A shaft for car brakes comprising a hollow `member adapted to be secured to a car end and to engage an operating element at its upper e d. and a ratchet Wheel mounted on said me nber,lon e side of the member being vdepressed to engage a key locking the ratchet Wheel in position.y

G. A shaft for car brakes comprising a hollow member adapted to be rotatably mounted at a car end, shaped at its upper end to receive an operating element and having the bottom portion thereof enlarged and adapted'to have an end of the brake chain secured thereto.

7. A. car brake shaft comprising a hollow member adapted to engage an operating element at one end and having a depressionv in one side and means disposed Within the member for locking the said operatingr element in position7 said means being always retained in the member above the depres` sion in its side.

.CHARLES A. CARSCADIN. GEORGE A. l/VOODMAN. llf'itnesses:

lVM. O. BELT, M. A. KIDDIE.

step to support the p 

